<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="Promise.js"></script>
</head>

<body>
    <script>
        let p = new Promise((resolve, reject) => {
            // resolve('ok');
            // throw 123;
            // setTimeout(()=>{
                resolve('ok');
            // },1000);
        })
        console.log(p);

        let result = p.then(value=>{
            console.log('value', value);
            return 123;
        },reason=>{
            console.log('reason',reason);
        })
        console.log('result',result);
    </script>

</body>

</html>